Able to be inserted; able to be put into something else.

Something that can be inserted.

A key that when pressed switches between the overtype mode and the insert mode of a computer.

(biochemistry) A receptor that is inserted into an enzyme / (genetics) A mutation that is inserted into a gene

plural of insertant

An image inserted into text. / A promotional or instructive leaflet inserted into a magazine, newspaper, tape or disk package, etc. / A mechanical component inserted into another.

plural of insertable

to put something into or inside something else

A person who, or device that inserts. / A machine that inserts components into envelopes for mass mailing.

That involves insertion.